package com;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: YJ
 * Date: 2024-3-11
 * Time: 11:03
 */


class ListNode {
    int val;
    ListNode next = null;

    public ListNode(int val) {
        this.val = val;
    }
}

public class deleteDuplicatesTest {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     *
     * @param head ListNode类
     * @return ListNode类
     */
    public ListNode deleteDuplicates (ListNode head) {
        // write code here
        if(head == null || head.next == null) {
            return head;
        }
        ListNode cur = head;
        while(cur != null && cur.next != null) {
            if(cur.val == cur.next.val) {
                cur.next = cur.next.next;
            } else {
                cur = cur.next;
            }
        }
        return head;
    }
}
